21. Select all accurate statements
A. All chordates have pharyngeal slits or clefts that function in swimming.
B. All chordates will have a muscular post-an*l tail as adults
C. All chordates will have a notochord during a stage in embryonic development
D. All chordates are bilaterally symmetrical animals that have a vertebral column
E. All chordates have a ventral, hollow nerve cord

In terms of alternation of generations, the internal parts of the pollen grains of seed-producing plants are most similar to a ) moss sporophyteb) moss gametophyte bearing both male and female gametangiac) fern sporophyted) fern gametophyte bearing only antheridia

How do accessory pigments chlorophyll?

Coat color in cats is determined by genes at several different loci. at one locus on the x chromosome, one allele (x ) encodes black fur and another allele (xo) encodes orange fur. females can be black (x x ), orange (xoxo), or a mixture of orange and black called tortoiseshell (x xo). males are either black (x y) or orange (xoy). bill has a female tortoiseshell cat named patches. one night, patches escapes from bill\'s house, spends the night out, and mates with a stray male. patches later gives birth to the following kittens: one orange male, one black male, two tortoiseshell females, and one orange female. what are the genotypes of patches, the stray male, and the kittens?